Agricultural productivity within Massachusetts Bay Colony increased while Native Americans showed Pilgrims how crops grow faster and better when rotten fish are dropped in along with newly-planted seeds. This new knowledge for the Pilgrims was an illustration of: (1)

7. The San Diego Zoo is contemplating a stuffed panda bear advertising promotion. Annualized sales data from local shops marketing the "Can't Bear it When You're Away" bear indicate that:
Q = 50,000 - 1,000P
where Q is Panda bear sales and P is price.
A. How many pandas could the zoo sell at $30

An increase in the competitively-set wage tends to cause: (w) firms to reduce the amounts of labor hired. (x) increases in the marginal revenue products of the workers a firm retains. (y) higher marginal factor costs of labor to competitive firms. (z)